23 or 26 Zenoah

I’m itching to get this heli flying but it still needs an engine, I have a Zenoah 26 in my Raptor at the moment and I’m thinking about using that for the Futura, I know people say the 26 suffers more vibes than the 23 and I have noticed that with the Raptor Gasser but I’m thinking because the Futura is belt driven the vibes shouldn’t be a problem as the belt should help dampen them.
Anyone running a 26 in their Futura ?

Thanks nadmanHmmm both are a bit slower than I'm used to, guess I need some 800 blades then

HT Lead is too short
Thats what I love about this hobby nothing is straight forward, I started to fit the 26 engine and all was going pretty well until it came to fitting the HT lead on the plug, dam thing is too short so t looks like bolting the coil to the frame nearer the plug.

Dam what’s wrong now I just fired the furura up but there's no servo in for the throttle yet so I just held the arm open slightly and it started easy but I couldn’t feel the clutch trying to grab so it’s either not working or I forgot to put the key in and do you know what, I don’t remember seeing itMore work tomorrow I guess.

The clutch is engaging but it feels way too late, I’ve only tried it on the bench and the heads not loaded but its past ¼ stick before it comes in.
Is there a gas clutch for these or can I get a thicker liner?
The other thing I noticed was the belt is running up on the bell gear so I’m assuming the barrel needs to go up to combat this or is there another way?

Hi Fixit,The clutch on the millenium(my 231 gasser) does not grab at all at lower speeds but works fine when the revs pick up,it has a nice take up,probably is fine.

Hi Fixit,The clutch on the millenium(my 231 gasser) does not grab at all at lower speeds but works fine when the revs pick up,it has a nice take up,probably is fine.

Thanks shawmcky That’s good news, I will give it a try before I start replacing and parts, just need to sort the belt alignment out now, trouble is there’s no adjustment unless I start slotting holes and I don’t really want to start doing that, I might try and cap the bell gear by bonding some plastic on it and then trim it up on the lathe, the belt can’t run off then.

Belt always moves up to the high point, sounds strange but its a fact
if belt rides up, tilt engine backwards on the futura (pulley side) ( shim,s on the rear engine bolts ) and belt will go down.

Right so the plug end needs to go down right?
I've just glued some thin plastic on the pulley and trimmed it on the lathe anyway, not sure if it will stay on but it survived the lathe so it might work.

Dam the wife, while I've been in the workshop she's just nicked my pudding I was saving for later

The plug end down, right.I see that your pulley is the older plastic version, the newer pulleys are aluminum and have a rim on top as standard. Although this prevents the belt from chewing up the frame , it just chew's itself up if not properly aligned.

OK, I'll see if I can run a straight edge across the two when I build it back up.
Cheers

The Future had its first flight today but as I thought the clutch didn’t grab soon enough and when I did get the blades spinning the tail was uncontrollable, it seemed like the gyro was in rate mode but that was probably because I didn’t have enough head speed, It did hover for a few seconds and everything else seemed ok and it was nice to see it get off the ground at least.
The clutch shoe had heat stains on it when I built it so I guess someone’s had problems with it before.

Robbe S4109 Wanted

I'm need a S4109 4 stroke clutch shoe like the one in the picture below, I'm led to believe the part has been changed but the suppliers still show the old picture on their web sites so there’s not much point in ordering one unless someone still has the old one in stock.
If you have one you don’t need or know where I can get one please let me know.
Cheers
Fixit

Hi Peter,
I have flown my Futura gasser with both types of clutches.
The stock 40mm and the heavy duty 43mm.
The one which is in my heli rightnow is the 40mm clutch and
I felt no different with the 43mm HD.
Btw, the "stock" clutch now is 43mm, I have the older 40mm size.
..
What is the inside diameter measured in your clutchbell Peter?
A 40mm clutchbell inside of the (used)liner measures 39,85mm
And a 43mm clutchbell measures inside of the (hardly used)liner 43,50mm.
Maybe you're liner is worn?
What size has it? (the clutchbell ! )

Another thing is, I fly my Futura with plenty rpm's, between 1500 and 1600 with 1.80meter rotor.
What rpm's are you running?